在英语中，当某人有时也很勇敢时，可以使用以下表达：
"Sometimes, they are also brave."（有时他们也很勇敢。）
"They can be brave at times."（有时他们也会勇敢。）
这些表达都可以用来描述某人不是总是勇敢的，但有时也会表现出勇敢的特质。
例如，你可以这样使用这些表达：
"I know John can be shy, but sometimes he is also brave. He stood up to the bully in the playground yesterday."（我知道约翰有时很害羞，但有时他也很勇敢。昨天他在操场上站起来对抗那个恶霸。）
"Sara can be timid, but when it comes to her family, she can be brave at times. She stood up to her father when he was being unreasonable."（萨拉有时也会胆怯，但当涉及到她的家人时，她有时会勇敢。她在她父亲不合理时站起来对抗他。）
"Sometimes, they are also brave."（有时他们也很勇敢。）
"They can be brave at times."（有时他们也会勇敢。）
这些表达都可以用来描述某人不是总是勇敢的，但有时也会表现出勇敢的特质。
例如，你可以这样使用这些表达：
"I know John can be shy, but sometimes he is also brave. He stood up to the bully in the playground yesterday."（我知道约翰有时很害羞，但有时他也很勇敢。昨天他在操场上站起来对抗那个恶霸。）
"Sara can be timid, but when it comes to her family, she can be brave at times. She stood up to her father when he was being unreasonable."（萨拉有时也会胆怯，但当涉及到她的家人时，她有时会勇敢。她在她父亲不合理时站起来对抗他。）